# NTSB WPR10CA088: Aviat A1-A, N17HY, West Jordon, UT, December 19, 2009

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: December 19, 2009, 12:30 local (19:30 UTC)
- Place: West Jordon, UT
- Coordinates: 40.619445, -111.992774
- Nearby events: https://openairdocs.org/map.md?lat=40.6194&lon=-111.9928&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 23, 2010
- Report: Approved by Office Director
- NTSB office: Western Pacific Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 75184
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10CA088
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75184/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75184
- Page: https://openairdocs.org/ntsb/WPR10CA088

## Probable cause

The pilot's failure to maintain directional control of the airplane during the landing roll in gusting wind conditions.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Aviat A-1A, 2 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2210405), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Aviat A-1A, 3 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=2210405), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Aviat A-1A, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2210405), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Aviat A-1A, 3 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2210405), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Aviat A-1A, 5 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2210405), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)
- [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Aviat A-1A, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=2210405), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md)

## Analysis

The pilot reported that while on final approach a crosswind gust pushed the nose of the airplane to the left. The pilot corrected back to the runway centerline and after landing "...a wind gust turned the tail and accelerated a right turn or a ground loop. The left wing touched the ground and the left gear collapsed." The undercarriage of the airplane where the left main gear attaches to the fuselage sustained substantial damage.

## Factual narrative

The pilot reported that while on final approach a crosswind gust pushed the nose of the airplane to the left. The pilot corrected back to the runway centerline and, after landing, a wind gust turned the tail and the airplane ground-looped. During the ground loop, the left wing touched the ground and the left gear collapsed. The undercarriage of the airplane where the left main gear attaches to the fuselage sustained substantial damage.

## Aircraft

- Registration: [N17HY](https://openairdocs.org/aircraft/N17HY), registered now, S/N 1454, built 1999 (OpenAirDocs)
- Reported make and model: AVIAT A1-A
- Registry model: [Aviat A-1A](https://openairdocs.org/model/aviat-a-1a) (registry code 2210405) (OpenAirDocs)
- Registry engine: [Lycoming 0-360-A1D](https://openairdocs.org/engine/lycoming-0-360-a1d) (registry code 41504, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1454
- Airframe hours: 506
- Engines: Lycoming O-360 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: John B. McDonald
- Registered owner: John B. McDonald
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 7, 2009, 2 hours before
- Departed: U42, West Jordon, UT
- Destination: SLC, Salt Lake City, UT
- Airport: U42, South Valley Airport, runway 16, 5,860 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review August 21, 2008; seat: front; flight hours: 305 total, 105 in this make and model, 305 as pilot in command, 30 in the last 90 days, 12 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 7 knots, gusting 10
- Visibility: 2 statute miles
- Lowest ceiling: none
- Temperature: 21 °F, dew point 25 °F
- Altimeter: 30.36 inHg
- Observed at: SLC, 1 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20091219053019A](https://openairdocs.org/incident/20091219053019A), Dec 19, 2009: Aviat Aircr A-1A, West Jordan, UT, Substantial damage. The pilot stated that on landing touchdown, a gust turned the aircraft to the right. The pilot attempted to correct to the left, the oversized (29") left main…

## Docket (1 files)

The files NTSB released with the investigation on December 30, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75184. 879 KB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 879 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40323438&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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